This equalizer has automatic level control, being designed by Sanyo for cassette recorders and radio. The maximum supply voltage of the LA3210 is 15 V and the typical idle current of 1.4mA.
Found in American documentation from the 1970s, this circuit can be designed based on a modern SCR,...
This circuit was found in an English magazine from 1978, but it is current and the common 2N3055 can...
This circuit was found in an American documentation from the 90's. What it does is provide at the...